Sand blast conveyer



Marbh 29,1932. BRIGGS 1,851,380-

SAND BLAST CONVEYER Filed Oct. 12, 1928 owner part Eober? E B/ 'ggy 1ii-gs of vhich' a. Figure l isasi Patented Mar. 29',*1 32 UNHTED Steamrarest" QFFH'CE ROBERT E; BRIGGS,'OF COLUMBUS, OHIO, ASSIGNOR TO THEJEFFREY MANUFACTUR? ING COMPANY, (if? COLUMBUS, OHIO, A CORPORATION OFOHIO SAND BLAST convnYna Application filed October 12, 1928a Serial No.3 125186.

The present invention. relates to certain new and useful improvements insand blast conveyers, of the type adapted to carry castings, andsimilarobjects through theeiiec-d scribed, means to v protecttheconveyermechanism from the destructive action ofthe sand blast. V

. Themeans Wherebyl attain thisobjct are fully set forth the followingspecification and illustrated in the accompanying draw- I de elevationof one embodi ment of my invent on,

I Fig. 2 is a cross sectional View onian enlarged scale takenalongthellne II- II of Fig.1.,

lEighB is a fragmentary plan view of the conveyer illustrated.in Fig. 2.

Fig.4 isa longitudinalsectional view taken" alongthe line IV IV ofFig.3.

" Like numeralsfrefer to similar parts. in the 25 several figures.

1 For purposes of illustration I have some- What diagrammaticallyshownzin Fig. 1 of the drawings, a structure suitable for thesup- =86port of a conveyer embodying my presentinvention. As hereshoWn-thematerial carrying element is supportedupon an elongated frame comprisinga plurality of vframes includinguprights and crosspieces lto theuprights .of which are attached the longitudinallyfextending angle bars2 and 3 the horizontally projecting fiangesot which con-1 stitute tracksalong hichthe chains 4 and. 5 ofthe material carryingelement ofthe con-aof the frame thus formed are sprocket Wheels. 6 and'frfa'round which thechains 4 and 5 travel. Suitable power connections,1 not shown in thedrawings, may be provided to 1 cause the rotation of these sprocketWheels,

; lappingside plates orlinks8 and 9 joined together by suitablepintles10 in the manner veyer travel. Suitably mounted at the ends but as suchdevices are well understood in' Well understoodfiii] the art; Rotatablymountedupon the pintles' 10 are rollers 11 adaptedto travel. along thetrack angles 2 and 3 to supply an;an ti-friction support for th'eloadupon 'theconveyer. The chains 4 and 5 are connected together by crossrods 12 which extend through suitable apertures, in

the outwardly projecting extensions 1 3 :of" the side bars 9. Spacingsleeves l are mounted upon the cross rods l2 and against the ends ofthese, sleeves, the extensions 13 are firmly clamped by-the nuts, 15screwv threaded to the cross rods 12. The spacing sleeves l4 which,constitute the material carryingelenient of tlieconveyer; are prefer}-ably formed of metallic tubes having a coat- 16 offresilient abrasionresist ng v ma-. terial; preferably a suitable preparation of rubbervulcanized thereon b'y Which the tubes are protected T from the{destructive actionio-f the sand blast used to clean the castr-=v ings',or other objects,Whilebeing carriedby the conveyer Instead of,vulcanizing a coating of ruhberupon the spacing sleeves 14, lengths o'frubber tubing maybe slipped over these rods form protective coyeringtherefor. :Attached to the uprights .1 are longitudinally extendingangle bars 1'1 having inward ly projecting flanges entending over theroll ers 11 of the upper run of the conveyer chains. Cooperating withthe angle bars 17 to'p'rotect the rollers and draft elements from thede-;

structive action of a sandblastdirected upon articles-carried by theconveyer; an endless sectionaland flexible shield comprising a' seriesof angle plates-18 are secured to the outward extensions 13 of the links9." One plate 18 is'secured to each link 9, and therefore partakes ofthe same movements as these links. a The horizontal flanges of theseplates 18 are arranged so that they overlap the hori zontal'flanges 17'ot the; stationaryshield plates. The shield platesl8beingsecuredto 21;

the extensions 13 by means of rivets and the rods 12 extendingtherethrough, constitute a series of shields arranged in articulatedrelationship travelling with the draft. elements to form asubstantiallycontinuous flexible shield Whichftravels above the stationary shield 17the and rollers 4 on the upper run of the conveyer and beneath therollers and tracks 3 on the lower run of the conveyer. The plates 18being spaced slight-1y apart as shown clearly in Figure 3 allowflexibility while passing around the sprocket wheels 6 and 7. Angle bars19 and 20 supported by the cross pieces and uprights 1 form an invertedchannel which forms with the tracks 3. a substantial housing to affordsin-ii-lar protection to the chains and rollers of the lower run of theconve er.

n the construction above described, I have provided a conveyor adaptedto support and transfer castings, or similar objects, during the processof their cleaning by sand blast or similar instrumentalities wherein themoving parts of the conveyer are effectively protected from thedestructive action of the cleansing agent. It is to be understood,however. that I do not limit myself to the precise construction hereshown since the apparatus may be subject to wide variation as to detailswithout departure from the spirit of my invention.

What I claim is 1. In va conveyer, a continuous flexible supportingelement including vertical side links, and a shield carried by anddepending from said supporting element to protect said side links.

2. In a conveyer, a continuous flexible supporting element includingvertical articulated side lin'ks, anda series of rigid laterallyprojecting members carried by said links and 00- operating with eachother to form a substan tially continuous protective shield for saidlinks.

3. In a conveyer, a continuous draft chain including vertical side linkshavin vertical outward extensions, rollers for said links, a stationaryshield plate overlapping said rollers, and shield plates secured to saidoutward extensions and overlapping said stationary shield plate to forma substantially continuous protective shield for said rollers and draftchain.

4. In a conveyer, an endless draft chain including draft links andflight attachment links, said flight attachment links being extendedlaterally to points in close proximity to the draft links to form ashield for the draft chain.

5. In a conveyer, an end-less draft chain including draft links andflight attachment links, said flight attachment links being extendedbeyond the draft links, and lateral extensions carried by the linkextensions and overlapping the draft links to form a shield therefor.

6. In a conveyor, an endless draft chain including articulated links,the inner links of the chain being extended laterally to shield thedraft chain, and carrier flights carried by the extended portions ofsaid inner links.

7. In a conveyer, an endless draft chain including articulated links,the inner links of the chain being extended to shield the draft chain,carrier flights carried by the extended portions of said inner links,and shield plates extended laterally from the inner links toward theouter links of the chain.

8. In a conveyer, the combination with an enclosed track; of an endlessdraft chain running on said track and including side links extended toform a wall of said enclosed track.

9.. In a conveyer, the combination with a pair of vertically spacedhorizontal shield plates constituting parts of an enclosed track; of anendless draft chain supported between said plates and including verticalside links extended to overlap the space between said shield plates andto enclose the draft chain within said enclosed track.

10. In a conveyer, the combination with a pair of vertically spacedhorizontal shield plates constituting parts of an enclosed track; of anendless draft chain supported between said plates and including verticalside links extended to overlap the space :between said shield plates,and auxiliary shield plates overlapping the space between said linkextensions and said first-named shield plates to enclose the chainwithin said enclosed track.

11. In a conveyer, the combination with a pair of vertically spacedhorizontal shield plates constituting parts of an enclosed track; of anendless draft chain supported between said plates and including verticalside links extended to overlap the space between said shield plates, andauxiliaryshield plates secured to the extensions of the side links ofthe chain to overlap the space between said link extensions and saidfirstnamed shield plates to enclose the chain within said enclosedtrack.

12. In a conveyer, the combination with a pair of vertically spacedhorizontal shield plates constituting parts of an enclosed track; of anendless draft chain supported between said plates and including verticalside links extended to overlap the space between said shield plates, andauxiliary shield plates secured to the extensions of the side links andbeing substantially co-extensive therewith to overlap the space betweensaid link extensions and said first-named shield plates to enclose thechain within said enclosed track- 13. In a conveyer, the combinationwith a pair of vertical spaced horizontal shield plates constitutingparts of an enclosed track; of an endless draft chain supported betweensaid plates and including vertical side links extended to overlap thespace between said shield plates, and auxiliary shield plates secured tothe extensions of the side links, and conveyer elements carriedby saidchain and serving to attach the auxiliary shield plates to the linkextensions to enclose thechain within said enclosed track.

14. In a conveyer, the combination with a pair of vertically spacedhorizontal. shield plates constituting parts of anenclosed track; of anendless draft chain supported between said plates and including verticalside links extended beyond the outermost shield plate, and auxiliaryshield plates carried by extensions of said side links tooverlap saidoutermost shield plate;

In testimony whereof I'have hereunto set my hand.

ROBERT E. BRIGGS;

